A rock is thrown horizontally off a 30-m high cliff at 15 m/s. a. How long does it take this rock to reach the ground?
b. How far away from the bottom of the cliff, horizontally, does the rock hit the ground?

What is the conversion factor between kg/m^3 and g/m^3. express your experimental values for the densities in kg/m^3.

50 g of ice at 0°c is dropped in a beaker containing 100 g of water at 0°c. what will be the contents of the beaker after 5 hours? assume that the room temperature is 0°c.

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.